Originally Posted by Hawes7701

Not sure if I'm missing something obvious but really confused about what I can use the ETC on....

was as just doing some random dummy bookings -

LHR-EWR
DUB-EWR
DUB-IAD rtn and had no problem applying the ETC.

Then thought about possibly using it for domestic travel within the US - and this is where I got confused.

Tried EWR -MSY and was given no option to use cert. this was replicated across many other routes (both rtn and one ways).

However, some routes did allow me to enter the code. From memory IAD - ORD and EWR - LAX. Both searched as one ways.

So, is there some rules about fare codes I should know or just a glitch on the site?

havent got got any firm plans yet but before I make any, would be good to know what I'm doing wrong....